Designers of modern Internal Combustion engines face huge challenges to deliver power units which satisfy legislation and have competitive economy, performance and manufacturing cost. In particular, technology advances in fuel injection systems, alternative fuels, combustion systems, multi-fuel operation, downsizing and engine management coupled to ever shorter engine development timescales dictate that analysis is used widely to deliver optimum solutions. Although CFD analysis of in-cylinder flow and combustion has been established for over 30 years, the demands for increasing accuracy, flexibility, speed of turnaround and closer integration of analysis into engine development programs have never been greater. To keep pace with developments in engine technology, CD-adapco is continually developing the software to add new capabilities, functionality and the speed and ease with which powertrain engineers can execute projects.